Abstract
Bioscorodite crystallization is a promising process for the proper immobilization of arsenic from acidic metallurgical wastewater, and Acidianus brierleyi is an effective archaeon to oxidize Fe(II) and As(III) simultaneously. This paper deals with the development of an experimentally validated mathematical model to gain insight into the simultaneous processes of Fe(II) and As(III) oxidation via microbial cells and the exopolysaccharide (EPS) matrix, As(V) precipitation, and bioscorodite crystallization, which are affected by several factors. After the mathematical structure was proposed, a model fitting was performed, finding global determination coefficients between 0.96 and 0.99 (with p-values < 0.001) for all the variables. The global sensitivity analysis via Monte Carlo simulations allowed us to identify the critical parameters whose sensitivity depends on culture conditions. The model was then implemented to evaluate the effect of cell concentration, Fe(II) and As(III) concentrations (at Fe/As = 1.4), and oxidation rate constants for A. brierleyi and the EPS region, noting that these factors play an important role in the process. Our results showed that the proposed model can be used as a robust simulation platform for the further analysis of the bioscorodite crystallization process under extremophilic conditions.
Subject
Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering
Reference49 articles.
1. Evaluation of health effects, genetic damage and telomere length in children exposed to arsenic in West Bengal, India;Mutat. Res. Genet. Toxicol. Environ. Mutagen.,2018
2. WHO (1993). Guidelines for Drinking-Water Quality, WHO Press. [2nd ed.].
3. Nicomel, N.R., Leus, K., Folens, K., Van Der Voort, P., and Du Laing, G. (2016). Technologies for Arsenic Removal from Water: Current Status and Future Perspectives. Int. J. Environ. Res. Public Health, 13.
4. Treatment of As-rich mine effluents and produced residues stability: Current knowledge and research priorities for gold mining;J. Hazard. Mat.,2020
5. Arsenic removal from water/wastewater using adsorbents—A critical review;J. Hazard. Mater.,2007